Your questions bring up many paradoxes that none of us really have the answer to.

I mean, I feel ridiculous even typing this, but at high enough doses, the entities you encounter can actually become your entire reality. It is utterly bizarre and extremely hard to articulate. I urge you to see for yourself, experiment, and keep an open mind.

You may not be able to reach your human arms into hyperspace to touch them, and none of us really know if they are they, or if they are really just us, you know? It's really hard to tell, despite how convincing the experience can be.

Since hyperspace is a realm of consciousness of sorts, try altering your thoughts / intentions in hyperspace. Communication / focus / expression can have a dramatic effect on the trip.

p.s. "This is my chance to live my dream instead of dreaming my life" Great quote. It's very true!

PPS I would also like to point out that hyperspace goes far beyond the realm of dreaming, and lucid dreaming. Soon you will see what I mean ..